Peltidea.] LICHENES. 153 



elevated whitish veins, a9 in Peltidea, and in the interstices, a few 

 scattered cyphella immersed below the surface, whose mouths how- 

 ever are elevated. 



27. Solorina. Ach. 



Thallns foliaceous, coriaceous, lobed, free, beneath having 

 fibrous veins ; apothecia subrotund, sessile, not bordered. 

 1. S. saccala, Ach. Thallus coriaceous, suborbicular, sub- 

 stellate, greyish-green, whitish and fibrous beneath ; buds in 

 minute, few, dispersed, rough, dark brown granules, at length 

 bursting with a fine whitish powder; apothecia dark-brown, 

 immersed. Ach. L. Un. p. 149. Eng. Bot. t. 228. 



On Brandon Hill. Ben Bulben, Mr. J. T. Mackay. The apothecia 

 burst up from beneath the cortical layer of the thallus, and at first 

 receive a border from it ; finally, however the apothecium sinks in the 

 thallus. By drying the surface becomes of a reddish-brown. 



28. Peltidea. Ach. 



Thallus foliaceous, or coriaceo-membranaceous, lobed, having 

 veins and fine soft fibres beneath; apothecia on proper lobules, 

 orbiculate or oblongo-rotundate, the entire obliquely affixed 

 on the thallus, by which, too, they are bordered. 



1. P. horizontalis, Ach. Thallus smooth, glaucous brownish- 

 green, beneath pale, reticulated with brown veins ; fertile lobes 

 short; buds in very minute, dark, scattered grains; apothecia 

 fiat, horizontal, transversely oblong. Ach. L. Un. p. 515. Eng. 

 Bot. t. 888. 



On rocks, near Killarney. County of Derry, Mr. David Moore. 



2. P. aphthosa, Ach. Thallus smooth, glaucous-green, be- 

 neath reticulated with veins, dark towards the centre ; buds m 

 minute, scattered, dark brown, rough granules; apothecia large, 

 ascending. Ach. L. Un. p. 516. Eng. Bot. t. 1119. 



On rocks in moist situations : at Sallagh Braes, near Belfast, Mr. 

 Tcmpleton. County of Derry, Mr. David Moore. The brown 

 bud.- may be observed expanding into new fronds, and even throwing 

 out their rootlets on the surface of the thallus ; the lobes are large and 

 often oblong. 



3. P. canina, Ach. Thallus coriaceous, glaucous-grey, 

 greenish when moist, downy above, reticulated with dusky grey 

 veins beneath ; apothecia suberect, terminal, revolute. Ach. L. 

 Un. p. 517 and /3. spuria, p. 518. Eng. Bot. U 2229 and t. 

 1542. 



On moss, among grass, or on the ground, common. A state occurs 

 at Dunkerron, never exceeding an inch in diameter, covering the wet 

 side of a ditch for several yards in extent, bearing apothecia abundantly 

 which agrees as well with the specimens of P. venosa in Mougeot and 

 Nestlcr, and with some collected on Ben Lawers, by the late Mr. John 



T 



